So, what to do with this. If we don't run it, we're pro-Linux. If we do run it, we're pro-Microsoft. And I'm sure that whatever we do, we're anti-Apple somehow. In any case, here we go: the latest market share figures from IDC about servers show that Windows is by far the most popular server operating system in terms of unit sales, increasing its market share even further. Linux, on the other hand, saw its market share in the server market sink a little.